Milan Technology MIL-SM801XX 7. Troubleshooting

7. Troubleshooting

This section is intended to help you resolve the most common problems on the MIL-

SM801XX series.

Look for loose or obviously faulty connections. Make sure the connections are

snug. If that does not correct the problem, try a different cable.

Non-standard or incorrectly pinned cables may cause anything from network

collisions to no network connectivity at all. A category 5 cable tester is

recommended during your network installation.

It is important to make sure that you have a valid network topology. Common

topology faults include excessive cable length and too many repeaters (hubs)

between end nodes. In addition, you should make sure that your network topology

contains no data path loops. Between any two-end nodes, there should be only one

active cabling path at any time. Data path loops will cause broadcast storms that

will severely impact your network performance.

You can diagnose common problems by monitoring the LED indicators on the front

panel of the switch. If you are having network connection issues the first place to

check is the switches LED link lights. If you do not have a link light, you may have

an incorrect cable type.

If the power LED does not light up when the power cord is plugged in, you may

have a problem with power outlet, or power cord.

RJ-45 ports - Use unshielded twisted-pair (UTP) or shield twisted-pair (STP) cable

for the RJ-45 connections. Use 100ohms Category 3, 4 or 5 cable for 10Mbps

connections or 100ohms Category 5 cable for 100Mbps connections. Also be sure

that the length of any twisted-pair connection does not exceed 100 meters (328

feet).

100Base-FX fiber port - Fiber multi-mode connector type must use 50/125 or

62.5/125µ multi-mode fiber cable. You can connect two devices up to 2-kilometers.

With single-mode fiber use 9/125µ fiber cable for multi-mode as well. You can

connect two devices from 15 to ~60- kilometers in full duplex operation.